This is a cotton shirt purchased at UNIQLO. If you look up product number 453279 at UNIQLO, you should find the same item! I bought it in 2023! The size is S. The material is 100% cotton, and it's machine washable/dry cleanable! [The following is the product description from UNIQLO] - Made with soft and casual extra fine cotton. - Relaxed silhouette long shirt that drapes beautifully. - Features a length that covers the hips and long cuffs. - Deep slits added to the shirt tail. - Can be styled in various ways, either as an outer layer or an inner layer. Specifications - Sheer: None - Fit: Relaxed It's currently on sale for ¥990, but it's sold out! This cotton shirt is perfect for the fall, so please take this opportunity to purchase it!